diff --git a/attn/attn_handler.hpp b/attn/attn_handler.hpp
index c969523..770f6e9 100644
--- a/attn/attn_handler.hpp
+++ b/attn/attn_handler.hpp
@@ -8,10 +8,11 @@
 /** @brief Attention handler return codes */
 enum ReturnCodes
 {
-    RC_SUCCESS = 0,
-    RC_NOT_HANDLED,
-    RC_ANALYZER_ERROR,
-    RC_CFAM_ERROR
+    RC_SUCCESS        = 0,
+    RC_NOT_HANDLED    = 1,
+    RC_ANALYZER_ERROR = 2,
+    RC_CFAM_ERROR     = 3,
+    RC_DBUS_ERROR     = 4
 };
 
 /** @brief Code seciton for error reporing */
@@ -37,8 +38,6 @@
 constexpr uint32_t CHECKSTOP_ATTN = 0x40000000;
 constexpr uint32_t SPECIAL_ATTN   = 0x20000000;
 
-// Need to add defaultHbTiInfo with SRC BC801B99 (hex)
-
 // Need to add defaultOpalTiInfo with SRC BB821410 (ascii)
 
 constexpr uint8_t defaultPhypTiInfo[0x58] = {
@@ -51,6 +50,16 @@
     0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
     0x20, 0x20, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
 
+constexpr uint8_t defaultHbTiInfo[0x58] = {
+    0x01, 0xa1, 0x02, 0xa8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x09, 0x01, 0x00, 0x00, 0x00, 0xbc, 0x80, 0x1b, 0x99, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00};
+
 /**
  * @brief The main attention handler logic
  *